Overview
The Wagner&Co EURO Solar Collector Type C20/C22 is a high-efficiency solar thermal collector designed for versatile installation. It features an anodised aluminium casing, EPDM rubber seals, and a copper absorber with a selective coating. The collector is available with either safety glass or anti-reflection safety glass.

Advantages
The EURO C20/C22 offers high efficiency due to its vacuum-coated flat plate absorber and 60mm insulation, resulting in low heat losses. The C20 AR variant includes anti-reflection glass, enhancing solar yield by 6-10%. The use of high-quality materials ensures durability and safe operation over decades. The product is recognized for its excellent price/performance ratio and has been tested according to European norms.

Technical Data
The collectors are available in different models (C20 AR, C20 HTF, C22 AR, C22 HTF) with varying dimensions and efficiencies. Key specifications include:

• Total area: 2.61 m² (C20) and 2.24 m² (C22)
• Efficiency: ηo = 85.4% (C20 AR/C22 AR), ηo = 81.8% (C20 HTF/C22 HTF)
• Maximum pressure: 10 bar
• Idle temperature: 232°C (C20 AR/C22 AR), 227°C (C20 HTF/C22 HTF)

The collectors are TÜV certified and comply with EU directives.

Installation and Planning
The collectors can be installed on-roof, in-roof, or free-standing. On-roof installations use rafter brackets and mounting rails, while in-roof installations require a minimum roof pitch of 27°. Free-standing setups allow for adjustable inclination. The system can handle wind and snow loads up to 2,250 N/m², and additional fixtures are recommended in extreme weather regions.

Installation Types

• On-Roof: Collectors are mounted above the roof surface, with up to 4 units connected in series.
• In-Roof: Suitable for roofs with a minimum pitch of 27°, with vertical installation.
• Free Standing: Allows for horizontal or vertical installation with adjustable inclination.

Figures illustrate pressure loss in relation to volume flow and the number of collectors connected in series, as well as efficiency curves based on temperature differences.

Conclusion
The Wagner&Co EURO C20/C22 solar collectors are designed for high efficiency and versatile installation, making them suitable for various applications in solar thermal energy systems.